Long ago I had some pretty basic hacked X-Fi drivers that enabled DDL/DTS Interactive, am I doing something wrong? Pretty sure this old Z77 board has an ALC892, if that makes a difference.
Just tried installing this with the "new" Realtek APO DDL_DTS option, no Nahmic APO installed, and the two Dolby/DTS APO selected, as well as Creative Cinema 5. Dolby app doesn't show up at all, DTS app wants a license. There is no Realtek control panel to be found anywhere. If I recall correctly, I used to see DDL/DTS as options I could enable on either the S/PDIF output or the regular analog minijacks, it's not on either. I think the secret sauce was setting the analog output to 5.1, enabling DTS Interactive, and then just using the optical output.
Enhancements are enabled on both devices. Stereo 96/24 works over S/PDIF, but that was working with the default drivers too. These ancient Logitech Z-5500 speakers can do DTS 96/24 but I don't think DTS Interactive ever supported it, I could stick with just using the DPLII decoder built-in to it, but DTS Neo always sounded better to my ears and I used to upmix it using the Creative driver that way.
If I have to do something in AAF ALC Audio Policy Tweak Tool to make it work, I sure as hell don't know where to start.